TAN (Tangent)

The TAN function returns the tangent of an angle.

Syntax

TAN ( angle )

'This program calculates the sine, cosine, and tangent
'of angles from 0 to 360 at 30 degree intervals. Results
'Are sent to Trig Table every 2 seconds

Const Pi = 4*ATN(1)'Declare Pi as a constant
Public Degrees, Radians, Cosine, Sine, Tangent'Declare Variables

DataTable (Trig,true,-1)
'Sample variables in Trig Table
  Sample(1,Degrees,FP2)
  Sample(1,Radians,FP2)
  Sample(1,Sine,FP2)
  Sample(1,Cosine,FP2)
  Sample(1,Tangent,FP2)
EndTable

'Main Program
BeginProg
  Scan(2,sec,0,0)
    If Degrees >= 360 Then Degrees = 0 'When degrees reach
    '360, reset degrees to zero
    Radians = Degrees*(Pi/180) 'Calculate angle in radians
    Sine =SIN(Radians) 'Calculate sine of angle
    Cosine = COS(Radians)'Calculate cosine of angle'
    Tangent = TAN(Radians) 'Calculate tangent of angle
    'Note: Tangent is undefined at 90 and 270 degrees. Table will
    'show tan(90) = tan(270) = -7999
    CallTable(Trig) 'Call Trig Table
    Degrees+=30  'Increment angle by 30 degrees.
  NextScan
EndProg

Remarks

The TAN function evaluates an angle and returns the ratio of two sides of a right triangle. The ratio is the length of the side opposite an angle divided by the length of the side adjacent to the angle. The Angle argument can be any valid numeric expression measured in radians.

AngleDegrees can be used to change the source for this function to degrees instead of radians.

To convert degrees to radians, multiply degrees by Pi/180. To convert radians to degrees, multiply radians by 180/Pi. Pi is approximately 3.141593.